Interesting Article About Grappling Attack vs Grappling Defence

The article basically suggests that it's much harder to use grappling to attack than it is to use grappling to defend.

Since it's always easier to hit someone from a dominant ground position than to try and submit them it makes more sense for pro MMA fighters to concentrate on defensive grappling, and offensive striking.

I think the article overgeneralized and focused on established positions instead of the beauty of transitions which is where submissions eventually come from and where my ass gets handed to me on a regular basis by those better than me.

Since it's always easier to hit someone from a dominant ground position than to try and submit them it makes more sense for pro MMA fighters to concentrate on defensive grappling, and offensive striking.

And how, without offensive grappling, are we to obtain these dominant positions?